【单选题】What is the stem of the word "teachers"?
【单选题】两辆小车A、B,可在光滑平直轨道上运动。A以3 m/s的速率向右与静止的B碰撞,A和B的质量分别为1kg和2kg,碰撞后A、B车的速度分别为-1 m/s和2 m/s,则碰撞的性质为: (A) 完全弹性碰撞 (B) 完全非弹性碰撞 (C) 非完全弹性碰撞 (D) 无法判断
【单选题】在一直线上相向运动的两个小球作完全非弹性碰撞,碰撞后两球均静止,则碰撞前两球应满足
【单选题】In the word "teachers", "teacher" is a ______.
【单选题】What is the stem of the word "teachers"?
【简答题】There are _____morphemes in the word “ teachers ”
【单选题】The word “teachers” contains three morphemes, but the word “shortenings” has ______morphemes.